1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6403734dd225502ded3cc475a70b27b8d4883bb0e97fd0e2dd31d372d850f2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0467608f-855f-4860-a2bf-7c03d91ce041.json and https://artists.proofprofile.net/proofs/artist/0467608f-855f-4860-a2bf-7c03d91ce041.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9081a574dc6e95fd2742a4840b1b014dcc882b3b925586538da8c1862054a10e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPQM0716943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bb3dbca8c8f7a3b873207ea8e0523253514e499c54a7a77ba8e68f8c1faf34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPQM0716945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5741cbe13d3fcb8d3f2114e71382a1aef8e363f1c4f7b5654dbb7500afdc61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPQM0613620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52477440b29df976e6a2fe439a18e868f666dcc87039c8f2c046d04c36d46486. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWVH0600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b9a50459a85b7fe6c1b59aad29936c24655e13f46de2b1605fde0653614db. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWVH0600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d096094debcfeeff10a6d2e3a203f65c407f2b284ce1c8b5f70a1b56a52eb5f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYPA1000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23599554a05956aa1e35b57fbe64645afc38f0de2a67817879432d617dd25426. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2144854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178452ec088d29d5395a1ee7c011e80c58a1c2dbe72400cb4fdcd86ab0c163c5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2457128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953cd5b7745bca0f703cbf9f4f93c156156a60c483fa3a3a7d672a0456a13cd8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2457131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54fc260ccd91531cd4706be263260045228cbc0ba3c165de9017b51fa3230fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE4AF2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c61ebd4265c1a57b513ee728403f5c1442f4934919e396d28726e1ea56c8e8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE4AF2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fa7e248dde59ac1776a4524b22a95373483801fdb750208a43cf3d4f9a04c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWVH0600208.
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